All Questions
363
questions
0
votes
0
answers
11
views
Forwarding https traffic from openvpn to internal server which has internet access
I am trying to achieve the following behaviour
Client <--> openvpn at 1194 <--> internal server at port 8080 <--> internet
I used iptables prerouting route on nat with DPORT 80 and ...
- 1
0
votes
2
answers
111
views
Portforwarding Port 22 ( for ssh ) over JioFiber Router not working ( port 22 is closed )
I am using a JioFiber Router ( Firmware version : SRCMTF1_JCOW414_R2.52.1 ) . The host that I want to expose to the internet has Ubuntu Server 24.04.
Private IPs :
Router ...
0
votes
0
answers
33
views
iptable-save command not showing any output
When i run iptables-save command on Ubuntu Ubuntu 22.04.3 LTS and Ubuntu 20.04.4 LTS it not showing default firewall chain rules when i run this other linux example centos or redhat i am able to see ...
1
vote
0
answers
41
views
Unable connect via port knocking
I am trying to set up port knocking on my server to enhance security. I've configured my firewall rules to use port knocking, where I have to connect to specific ports in a specific sequence before ...
- 11
0
votes
2
answers
1k
views
Route traffic on different ports through different network interfaces
My situation is this: I’m setting up a server running at home (Ubuntu Desktop 22.04.3 LTS) to run an email server and a few other online services. As we all know, for my email to work reliably and not ...
- 45
0
votes
0
answers
47
views
Checking this network connection (port forwarding)
I have the below setup, I want to be be able to reach the device (192.168.2.180 eth) from my desktop (192.168.1.3 wifi) I have a linux server in the middle (192.168.1.111 WIFI), (192.168.2.22 Eth)
...
- 11
0
votes
1
answer
257
views
Port Forward for LAN
I bought a server and have Ubuntu 22.04 installed.
When I run various Github projects like Text Generation Webui, Automatic1111 Stable Diffusion, etc., how do I forward the port to access it from my ...
- 103
0
votes
0
answers
30
views
I'm attempting to execute a Flask test file, but when attempting to access it through the browser, an error stating that the site cannot be reached
I have tried creating an inbound rule in my firewall to allow port <5000> but its still showing site cannot be reached.
i have also tried to Check UFW (Uncomplicated Firewall) with this command
'...
- 1
0
votes
0
answers
89
views
nslookup works but network no
System information:
ubuntu server CLI only 22.04.3 LTS.
Kernel 5.15.0-88-generic
I'm using zerotier network to connect to my server. Everything worked fine and then maybe I changed something, maybe no,...
0
votes
0
answers
286
views
Setting up a reverse proxy on home lab
I'm very new to Linux and bash. I'm working on a homelab (machine a) project.
My ultimate goal is to set up Nginx on my server and connect externally (machine c) to Docker apps File Browser, possibly ...
- 1
4
votes
1
answer
955
views
I can't connect to Ubuntu server from local network, but can from outside
This is a weird one that has been driving me crazy for a while. I just can't work it out.
I'm running Ubuntu 22.04 (with all latest patches) on a Dell PowerEdge-r710 server. It's hosting a variety of ...
- 143
1
vote
1
answer
156
views
BIND9 on Ubuntu 20 - Cannot configure Zone to work properly
I installed it on Ubunto 20 and configured two zones
Options config file
acl internal {
localhost;
localnets;
192.168.70.0/24;
10.200.157.0/24;
};
options {
...
- 11
0
votes
0
answers
170
views
Restrict access to Docker container port to ip adresses
There are several docker containers on my server, exposing ports. Now I try to restrict the access to the ports to IP-Adresses being able to insert rules without allowing the policy. I apply IP-Tables ...
- 1
0
votes
0
answers
288
views
UFW allow all IP from ASN
How to allow access to ubuntu with UFW firewall for all addresses belonging to one ICT provider with its ASN number (Is it possible?)?
0
votes
0
answers
103
views
Simulate an NVA Appliance in Azure that forwards traffic with an Ubuntu VM
In Azure, I have 3 VirtualNetworks, A, B and C. A and B are peered to C.
I have an Ubuntu VM in all 3 of them.
I would like to have the VMs in VirtualNetworks A and B, be able to talk to one another ...
- 101
0
votes
1
answer
146
views
Port Forwarding to another machine Rust gameserver
I need to forward UDP port 28015 of my local machine to another machine with port UDP 28021. Rust Game Server. (Redirect incoming traffic on a specific port to a different IP address with altern port)
...
0
votes
0
answers
54
views
Port Forwarding to vboxnet0 with saving client's real IP
I set up the internet on a virtual machine that is running through VirtualBox and set up port forwarding. First, in rt_tables of Host Machine (iproutes2) I added this:
100 vm0
Then I run this:
ip ...
- 127
1
vote
1
answer
756
views
How to unblock my IP from Ubuntu Server 22.04?
Here is the output of iptables -L -v in Ubuntu 22.04:
https://pastebin.ubuntu.com/p/47ysNrXCcN/
Chain DENYIN (1 references)
pkts bytes target prot opt in out source ...
- 111
0
votes
0
answers
701
views
Connection via SSH works once or twice then never again for that client
I have recently set up a Ubuntu Server minimized. I initially used the server through an SSH with client1 but after one use I kept getting Connection Timed Out when attempting to ssh from client1. I ...
0
votes
0
answers
311
views
Issues setting up wireguard on an Ubuntu 22 machine
It's the first time I'm trying to set up a wireguard server on a Ubuntu 22 machine and I don't understand what exactly am I doing wrong. I'm using https://github.com/angristan/wireguard-install as an ...
1
vote
0
answers
123
views
iptables show ACCEPT but connection got refused
I have a Django application accessible at port 8080. My current iptables is set
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy DROP)
...
- 163
0
votes
0
answers
1k
views
Port Forwarding in Ubuntu Server 22.04 not working for me
I am fairly new to ubuntu and need help. I am running ubuntu server on my vps and home server. They are connected via Wireguard and I would like to forward the port 25565/tcp,udp to my home server. I ...
0
votes
1
answer
156
views
Unable to remote access the web server running on Ubuntu machine
I'm unable to remote access nginx server or express server or any server running on Ubuntu in the same network
I tried every solution found on Google, chat gpt but no benefit
I'm able to ssh on Ubuntu ...
- 1
0
votes
0
answers
336
views
Port forwarding not working
I have a machine on my home network I am trying to port forward (for rust if that helps) and I need to get these done
TCP: 27015, 27036, 28016, 28083
UDP: 27015, 27031-27036, 28015
I have allowed all ...
- 1
0
votes
1
answer
964
views
UFW - Port is reachable for everyone although only certain IP's are opened
I run an Ubuntu 22.04 server on an VPS with a current version of UFW.
Further i run an docker instance with firefox - https://hub.docker.com/r/jlesage/firefox
The port is routed to 5800 to access this ...
- 1
1
vote
0
answers
107
views
how can i set data traffic limit for per user ? (based on uid/gid )
I need to set a traffic limit for each user , which should be based on the username or group name. I have already tried nethogs software and some similar programs, but they limit the bandwidth. In ...
- 11
3
votes
0
answers
5k
views
How to check if ip forwarding is enabled
i have 2 vps services from 2 diffrent providers and i want to use iptables for prerouting .
i can do it easily on one but cant do it on the other one , i almost read all articles and tried them but ...
- 31
0
votes
0
answers
1k
views
22.04: How to add persistent routes in netplan
What is the best way to add the following rules to netplan?
1 ip rule add from 172.16.9.132 table 128
2 ip route add table 128 default via 172.16.9.1
3 ip route add table 128 to 172.16.9.0/24 dev eth0
...
- 101
-1
votes
1
answer
225
views
Connection closed by port 80 ubuntu
i have executed this code to copy a folder by my desk to my ubuntu instance
francesco@AirdiFrancesco ~ % scp /Users/francesco/Desktop/chimica [email protected]:/home/ubuntu
only that after this ...
- 1
0
votes
0
answers
128
views
Make port 80 globally accessible
I am trying to set up a VPS server (Ubuntu 22.04 LTS) bought from Microsoft. I am able to set up NGINX on my own by watching this tutorial. After setting up all the configs stated in the video I ran ...
- 101
2
votes
1
answer
3k
views
Ubuntu Server 22.10 on Virtualbox - host-only network and NAT can't coexist together?
I'm trying to create a Virtualbox VM (running Ubuntu Server 22.10) which has NAT (for internet access) and host-only adapter with static IP. It seems that I can get only one of both working. Optimally ...
- 177
0
votes
0
answers
928
views
Opening Ports in Ubuntu 22.04
I understand that this may seem simple enough and there are many tutorials out there, but I've tried almost everything. My goal is to open any port on my Ubuntu desktop (starting with 22 for ssh) and ...
- 83
1
vote
1
answer
516
views
How to drop an existing connection on Ubuntu 20.04 server?
I executed the following command to ban them. But it didn't work. It only works when there is a new connection from that IP.
sudo ufw insert 1 deny from 46.1.67.244 to any && sudo ufw reload
...
- 11
0
votes
1
answer
600
views
iptables to block http and ssh in one direction
I have a topology where there is a Linux as a router that connects two Linux, and I want to use iptables to filter ssh and HTTP in one direction.
I used the below code but it didn't work!
I really ...
0
votes
0
answers
433
views
Port 3003 is not working while ports 3000 - 3002 are working fine
I have several node.js apps on an Ubuntu server working just fine on ports 3000 - 3002. Now I added one more app to port 3003 and it is not working anymore. I switched the apps on port 3002 and 3003 ...
- 101
1
vote
1
answer
440
views
How to fix MGR: dropped slow initial connection with pptpd?
I have a pptd server installed on a remote BareMetal server
I have followed the tutorial here to the dot:
However I get
MGR: dropped slow initial connection
I have tried everything I can think of
...
- 402
0
votes
1
answer
59
views
Setup additional interface
I have a dedicated server with Ubuntu Server 18.04. I need an additional IP-address so I leased a cheap VDS, then I've setup pptpd on VDS and pptp on dedicated server. Then I configured a VPN-...
- 127
0
votes
1
answer
379
views
Ubuntu server does not accept any request from outside
I have a database in ubuntu server, and it works on server, the port is 5436.However, I can not connect it from outside.
I use ufw order
it lists as below
[17] 5436 (v6) ALLOW IN ...
- 180
2
votes
1
answer
3k
views
iptables - Port forwarding with keeping source IP
I have a Ubuntu Server with two interfaces: enp1s0 and ham0 (private network). In interface ham0 my IP-address is 25.70.228.164. Another machine in this network has IP-address 25.11.1.253. I tried to ...
- 127
0
votes
1
answer
619
views
DDoS Attack - Iptables bad configuration
I have Ubuntu 20.04.4 LTS. I am under a DDoS attack and don't know how to limit the connections made by multiple IP's (avobe 500).
I saw some post, like this or this, but don't know how to follow the ...
0
votes
1
answer
1k
views
Cannot connect to home ubuntu server using public static IP address outside of LAN
Running ubuntu 22.04
I have a test express.js app running and I can connect to it via 192.168.1.6:3000 as local ip and also as (static public IP):3000 but only from devices connected to my WiFi.
As ...
- 17
1
vote
0
answers
3k
views
Your Outline Server was installed correctly, but we are not able to connect to it
I'm trying to config Outline VPN and
I bought a Droplet from Digitalocean with Ubuntu 22.
So, my server generated URI string correctly:
CONGRATULATIONS! Your Outline server is up and running.
To ...
- 111
0
votes
0
answers
62
views
Can't access Ubuntu Server with SSH after doing something with iptables
I'm trying to run a MC-Server on an Ubuntu Sever (Oracle Cloud). I already port forwarded 25565 and 22 but still couldn't access the server. I found these commands on another tutorial, but when I ...
- 1
0
votes
0
answers
69
views
iptables/ ufw problem with getting emails
I have a very difficult problem that I can't seen to solve.
I have an Ubuntu Server 20.04.5 LTS set up as a firewall/ router, so it has two interfaces. One internet connected and the other lan ...
- 11
0
votes
1
answer
370
views
My Ubuntu Server Ports got locked
I just tried to join to my Jenkins on my VPS as usual. When I try to access the URL it returns the error code ERR_CONNECTION_TIMED_OUT. This happens as well with port 8080 for my website and other ...
- 31
-1
votes
1
answer
140
views
How to read and alter packet info when forwarding
I have two laptops running ubuntu(both 20.04.4 LTS x86_64) and im trying to use one as a router(lets call them laptop1 and laptop2 and laptop2 is acting as a router). So far ive used the ip route ...
0
votes
1
answer
406
views
IP - Tables NAT ens19 <> ens18
I am hoping someone good with IP tables can give me some pointers.
I am attempting a DNAT with 2 interfaces, Basically what I am trying to do is anything from one interface needs to be pushed to a ...
4
votes
1
answer
9k
views
22.04 - ufw/ip tables could not fetch rule set
I'm trying to get UFW up and running on a Raspberry Pi 4 running Ubuntu server 22.04. But I am at a loss.
# via SSH session:
~$ sudo ufw status
ERROR: problem running iptables: iptables v1.8.7 (...
- 61
1
vote
1
answer
4k
views
How To Permanently keep port 80 open On Ubuntu Server
I just installed Ubuntu Web Server and at the end of the install, it mentioned to me that I could go to IP address. Did that and got the great saying "can't connect". I figure port 80 didn't ...
- 5
0
votes
1
answer
657
views
Ubuntu server 22.04 VM Openvpn connection issues
I'm currently working on a homelab project and built a home server using VMWare ESXI 7. On this Hypervisor i run two ubuntu 22.04 server images, one for file sharing and one to serve as a vpn server.
...
